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<h1>Fret Positions</h1>

<p>The fret positions are calculated after the following formula:</p>

<pre class="codebox">
SLn = SL / ( 2 ^ ( n / 12 ))
</pre>

<p>with SLn as the distance of the n-th fret from the saddle (i. e. the length of the vibrating string), and SL as the scale length (i. e. the distance of the nut from the saddle).</p>

<p>Because it is easier to measure the fret position from the nut side, we can write the formula as</p>

<pre class="codebox">
FPn = SL - SL / ( 2 ^ ( n / 12 )) = SL &times; (1 - 1 / ( 2 ^ ( n / 12 )))
</pre>

<p>with FPn as the distance of the n-th fret from the nut.</p>

<p>The factor 1/(1-1/2^(1/12)) gives the all familiar value 18.1715, the amout of lenght by which the next fret can be calculated from the previous fret.</p>

<h2>Links</h2>

<dl>
<dt><a href="www.byersguitars.com/Research/Research.html">www.byersguitars.com</a> Research</dt>
<dt><a href="http://liikanenguitars.com/Guitar-compensation.php">liikanenguitars.com</a> Guitar Compensation</dt>
<dt><a href="http://liutaiomottola.com/formulae/fret.htm">Liutaio Mottola</a></dt>
</dl>

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